I'm definitely not an experienced tree feller. I've only cut down 25 or 30 trees, and most of them have been less than 12 inches in crowded conditions, so i end up having my trees fall part down, and then have to drag them down the rest of the way. So i dont see a lot of dramatic, clean falls to determine how well i cut. But everything I read or watch emphasizes the importance of a clean notch and precise back cut. Some cutters seem to obsess about it, and spend an extreme amount of time getting their notch perfect. But in olden times people used axes. It wasn't possible to get a clean, smooth notch or be super accurate in placing their back cut.. But they seem to have been able to successfully fell trees. Just curious. How vital is it to have a perfect notch and backcut?